Seamless pipes fall under Chapter 73 of the HS Code system, titled “Articles of Iron and Steel.” Specifically, they are categorized under heading 7304, which pertains to "Seamless iron (other than cast iron) or steel pipes, tubes, and hollow sections." This heading is further divided into subheadings based on characteristics such as diameter, thickness, and material composition. This article will briefly introduce HS codes 7304 for import and export of seamless pipes.
2025-01-21
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Cold Drawn Seamless Tubes (CDS) are widely utilized in applications that demand exceptional strength and resistance to high pressure. In comparison to hot-finished seamless tubes, CDS offers tighter tolerances and superior mechanical properties, making them ideal for mechanical use. These tubes are particularly favored in the hydraulic industry for manufacturing chrome-plated telescopic cylinders and hydraulic rods. Additionally, they are commonly employed in the production of large-diameter, thick-walled, high-pressure hydraulic cylinders. Cold drawn seamless tubes are also integral to the manufacturing of heavy-duty equipment, including cranes and garbage trucks. Below is a detailed size chart for cold drawn seamless tubes.
2025-01-21
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Galvanized steel pipes are steel pipes coated with a layer of zinc, which serves as a protective barrier against corrosion, significantly extending their service life. This zinc layer acts as a solid "protective armor" for the steel pipe, safeguarding it from the damaging effects of environmental erosion. This article will briefly introduce application of galvanized steel pipes in power engineering.
2025-01-20
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The petrochemical industry is a vital pillar of the national economy, involving complex production processes that often operate under harsh and extreme conditions. Throughout the oil refining and chemical product synthesis stages, the pipeline system must endure high temperatures, high pressures, and severe corrosive environments. This article will briefly introduce seamless steel pipes in the petrochemical industry.
2025-01-20